--- a/options.h
+++ b/options.h
@@ -5,6 +5,11 @@
 #ifndef DROPBEAR_OPTIONS_H_
 #define DROPBEAR_OPTIONS_H_
 
+#if !defined(DROPBEAR_CLIENT) && !defined(DROPBEAR_SERVER)
+#define DROPBEAR_SERVER
+#define DROPBEAR_CLIENT
+#endif
+
 /* Define compile-time options below - the "#ifndef DROPBEAR_XXX .... #endif"
  * parts are to allow for commandline -DDROPBEAR_XXX options etc. */
 
